[INFO] updating cached repository https://github.com/itbaiyang/rust-book
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d30d219e0e460fdcabbf62517b3aba374ef2dfd0
[INFO] testing itbaiyang/rust-book against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitbaiyang%2Frust-book" "/workspace/builds/worker-9/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/itbaiyang/rust-book on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/itbaiyang/rust-book
[INFO] finished tweaking git repo https://github.com/itbaiyang/rust-book
[INFO] tweaked toml for git repo https://github.com/itbaiyang/rust-book written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/itbaiyang/rust-book already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 703149b3d64314e6ff130f820197ff0de3775685a9b12ed685df71787815cc62
[INFO] running `"docker" "start" "-a" "703149b3d64314e6ff130f820197ff0de3775685a9b12ed685df71787815cc62"`
[INFO] [stderr]    Compiling book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `split_at_mut`
[INFO] [stderr]   --> src/advanced_m/unsafe_init.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 | fn split_at_mut(slice: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.82s
[INFO] running `"docker" "inspect" "703149b3d64314e6ff130f820197ff0de3775685a9b12ed685df71787815cc62"`
[INFO] running `"docker" "rm" "-f" "703149b3d64314e6ff130f820197ff0de3775685a9b12ed685df71787815cc62"`
[INFO] [stdout] 703149b3d64314e6ff130f820197ff0de3775685a9b12ed685df71787815cc62
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f8b36939529990dded0e08f056ce95ae1253c8b4570159e7c2b9c02b568bb644
[INFO] running `"docker" "start" "-a" "f8b36939529990dded0e08f056ce95ae1253c8b4570159e7c2b9c02b568bb644"`
[INFO] [stderr]    Compiling book v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `split_at_mut`
[INFO] [stderr]   --> src/advanced_m/unsafe_init.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 | fn split_at_mut(slice: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `split_at_mut`
[INFO] [stderr]   --> src/advanced_m/unsafe_init.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 | fn split_at_mut(slice: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.03s
[INFO] running `"docker" "inspect" "f8b36939529990dded0e08f056ce95ae1253c8b4570159e7c2b9c02b568bb644"`
[INFO] running `"docker" "rm" "-f" "f8b36939529990dded0e08f056ce95ae1253c8b4570159e7c2b9c02b568bb644"`
[INFO] [stdout] f8b36939529990dded0e08f056ce95ae1253c8b4570159e7c2b9c02b568bb644
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6f02c6f57b5b5b068bce6bded3983a095e3d4811b827b43146099a8140fd89e4
[INFO] running `"docker" "start" "-a" "6f02c6f57b5b5b068bce6bded3983a095e3d4811b827b43146099a8140fd89e4"`
[INFO] [stderr] warning: function is never used: `split_at_mut`
[INFO] [stderr]   --> src/advanced_m/unsafe_init.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 | fn split_at_mut(slice: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `split_at_mut`
[INFO] [stderr]   --> src/advanced_m/unsafe_init.rs:58:4
[INFO] [stderr]    |
[INFO] [stderr] 58 | fn split_at_mut(slice: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) {
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/book-dd0ee49b3c3f3a6a
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test closures_m::closures_test::call_with_different_values ... ok
[INFO] [stdout] test iter_m::iter_test::lazy_iter ... ok
[INFO] [stdout] test iter_m::iter_test::name ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/book-695e57cf80532629
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/closures_test-8041e2758bb2d670
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests book
[INFO] [stdout] test c_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "6f02c6f57b5b5b068bce6bded3983a095e3d4811b827b43146099a8140fd89e4"`
[INFO] running `"docker" "rm" "-f" "6f02c6f57b5b5b068bce6bded3983a095e3d4811b827b43146099a8140fd89e4"`
[INFO] [stdout] 6f02c6f57b5b5b068bce6bded3983a095e3d4811b827b43146099a8140fd89e4